Manual

25
U
NDERSTANDING PARALLAX
Parallax is the apparent movement of the target relative to the reticle when
you move your eye away from the center point of the eyepiece. It occurs
when the target does not fall on the same optical plane as the reticle.
Maximum parallax occurs when your eye is at the very edge of the exit
pupil. (Even in this unlikely event, our 4x hunting scope focused for 150
yards has a maximum error of only 8/10ths of an inch at 500 yards.)
At short distances, the parallax effect does not affect accuracy. (Using the
same 4x scope at 100 yards, the maximum error is less than 2/10ths of an
inch.) It is also good to remember that, as long as you are sighting straight
through the middle of the scope, or close to it, parallax will have virtually
no effect on accuracy in a hunting situation.
A
BOUT FIXED PARALLAX DISTANCE SCOPES
Any fixed focus optical system can be adjusted to be parallax free at
only one distance. Most Leupold scopes are adjusted at the factory to be
parallax-free at 150 yards.
However, there are exceptions: